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(11) | EP 2 135 663 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Wet scrubber tray |
| (57) A wet scrubber tray can be provided with increased resistance to vibration-induced
cracking. The tray is self supporting to eliminate wastage of raw material, and additional
internal stiffeners added to the tray make multiple intermediate stiffeners. The connection
of the intermediate stiffeners to the perforated bottom plate is changed to eliminate
the shop weld in the bottom plate. The holes in the perforated bottom plate are repositioned
so that they are moved away from the boundaries of the tray to reduce their influence
on boundary conditions. The thickness of the tray material may be increased to lower
the vibratory stresses. The mechanism for holding the trays themselves within the
spray absorber tower is changed so that the trays are now held down by plate material
that is attached to the support grid, but not to the trays. Three field welds are
applied to the sides of each tray to hold the trays in place relative to each other
and are strategically placed to allow adjacent side stiffeners to act together as
a composite section, thus increasing their strength. Elastomeric material such as
neoprene is used at the tray-to-grid attachments to increase the damping of the system.
Formed features in the trays such as single or multiple ribs, bosses, domes or dimples
may also be provided to increase tray stiffness or influence wet scrubber performance.
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